<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列添加</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 提示信息区域 -->
      <el-alert title="添加商品信息" type="info" center show-icon> </el-alert>
      <!-- 提交表单 -->

      <!-- 步骤条区域 -->
      <el-steps :active="activeIndex - 0" finish-status="success" space="200px" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="基本信息"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <!-- tab栏区域 -->
        <el-tabs
          tab-position="left"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" pros="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="categoryList"
                :props="props"
                @change="handleChange"
                clearable
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="cb"
                  v-for="(cb, j) in item.attr_vals"
                  :key="j"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item v-for="(item, i) in onlyTableData" :key="i" :label="item.attr_name">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor :content="addForm.goods_introduce" />
            <el-button type="primary" class="btnClass" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="pictureDialogVisible" width="50%">
      <img :src="previewPath" alt="" />
      <span slot="footer" class="dialog-footer"> </span>
    </el-dialog>
  </div>
</template>
<script>
import _ from 'lodash'
export default {
  data() {
    return {
      // 控制当前显示的tab栏和进度条
      activeIndex: '0',
      // 添加表单数据源
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 级联选择其中真正选中的值
        goods_cat: [],
        // 存储图片的临时路径
        pics: [],
        // 存储富文本编辑器的内容
        goods_introduce: '',
        // 商品的动态参数和静态属性
        attrs: []
      },
      // 添加表单验证规则
      addFormRules: {
        goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
        goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
        goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
        goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
        goods_cat: [{ required: true, message: '请选择商品分类', trigger: 'blur' }]
      },
      // 商品分类数据
      categoryList: [],
      // 级联选择器的配置规则
      props: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
        expandTrigger: 'hover'
      },
      // 动态参数数据
      manyTableData: [],
      // 静态参数数据
      onlyTableData: [],
      // 上传图片的地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // upload组件设置请求头，因为upload上传时没有使用本地设置的axios请求拦截器
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 控制图片的显示与隐藏
      pictureDialogVisible: false,
      // 图片的真实是地址
      previewPath: ''
    }
  },
  created() {
    this.getCategoriesList()
  },
  methods: {
    // 获取商品分类数据
    async getCategoriesList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败')
      }
      this.categoryList = res.data
    },
    // 监听级联选择器的改变
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    // 监听tab栏的切换
    beforeTabLeave(activeName, oldActiveName) {
      // console.log(activeName, oldActiveName)
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.info('请先选择商品分类')
        return false
      }
      return true
    },
    // 当tab栏被点击切换时
    async tabClicked() {
      // 切换为动态参数tab栏时
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: {
            sel: 'many'
          }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取商品参数失败')
        }
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        })
        this.manyTableData = res.data

        console.log(this.manyTableData)
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: {
            sel: 'only'
          }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取商品静态属性参数失败')
        }
        this.onlyTableData = res.data
        console.log(this.onlyTableData)
      }
    },
    // 图片预览操作
    handlePreview(file) {
      this.previewPath = file.response.data.url
      this.pictureDialogVisible = true
    },
    // 图片删除操作
    handleRemove(file) {
      const filePath = file.response.data.tmp_path
      const index = this.addForm.pics.findIndex(x => {
        if (x.pic === filePath) {
          return true
        }
      })
      this.addForm.pics.splice(index, 1)
      console.log(this.addForm.pics)
    },
    // 图片上传成功时的钩子函数
    handleSuccess(response) {
      const picInfo = {
        pic: response.data.tmp_path
      }
      this.addForm.pics.push(picInfo)
      console.log(this.addForm.pics)
    },
    // 添加商品
    add() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.info('请填写必要的信息')
        }
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数数据
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('提交商品失败')
        }
        this.$message.success('添加商品成功')
        console.log(res.data)
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    // 商品分类Id
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>
<style lang="less" scoped>
.el-steps {
  margin-top: 15px;
  font-size: 14px;
}
.el-tabs {
  margin-top: 20px;
}
.el-checkbox {
  margin: 0 5px 0 0 !important;
}
.btnClass {
  margin-top: 7px;
}
</style>
